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- Company details
TREVI S.p.A., the construction division of the Trevi Group, is a world leader in the ground and underground engineering fields (special foundations, soil consolidation, recovery of polluted sites). It operates worldwide carrying out geotechnical works in various sectors of the construction industry: large infrastructures, civil and industrial buildings, surface and underground transportation systems, maritime projects, etc.
Established in Cesena (Italy) in 1957 by Davide Trevisani, Trevi Group also consists of SOILMEC, a company dedicated to the design, manufacturing, and marketing of specialized technologies in the same sectors.
Over the last 60 years, global foundation engineering has had one main leader: TREVI. A company that managed to combine continuous studies, innovation, rich experience and endless research for quality with a wise entrepreneurial tradition. It satisfied the multi-faceted requirements of the foundation field, never failing to show a positive approach to the variety of cultures encountered.
Internationalization, integration and the continuous exchange between its two divisions are among the reasons for the success of the Trevi Group.
The parent company TREVI – Finanziaria Industriale S.p.A. has been listed on the Milan stock exchange since July 1999.
Year of establishment:
1975
Number of employees:
FROM 100 TO 499 EMPLOYEES
Annual turnover:
over 25 milion Euro
Reference year of turnover:
2022
Export turnover:
More than 50 million Euro
Activities:
Manufacturing of concrete products for the building industry
CONSTRUCTION OF RESIDENTIAL AND NON-RESIDENTIAL BUILDINGS
CIVIL ENGINEERING
Construction of roads and motorways
Construction of bridges and tunnels
Construction of public utility works for the transport of liquids
Construction of hydraulic works
Construction of other civil engineering works nec
SPECIALIST CONSTRUCTION WORKS
Demolition
Preparation of building sites
Drilling and perforations
Installation of electrical systems in buildings and other construction works (including maintenance and repair)
Installation of electronic systems (including maintenance and repair)
Installation of street lighting systems and electrical signalling devices, lighting of airport runways (including maintenance and repair)
Installation of hydraulic, heating and air conditioning systems (including maintenance and repair) in buildings or in other construction works
Installation of systems for gas distribution (including maintenance and repair)
Installation of fire extinguishing plants (including integrated systems and maintenance and repair)
Other specialist construction works nec
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In the heart of Frankfurt’s business district, the spectacular skyscraper complex is considered one of the largest building sites in Germany. Four towers were in fact erected, reaching heights up to 228 m, above the common base construction, with a foundation slab laying at a depth of 20 m below the ground level. The complex will accommodate more than 600 apartments, social infrastructure, hotels, multiple restaurants, and the highest office space in Germany. TREVI S.p.A. was appointed by Groß & Partner to execute the underground retaining structure by means of a diaphragm wall, as well as the whole foundation works.
The Grand Paris Express is the largest infrastructure project currently under construction in Europe. The Project owner is the Société du Grand Paris and a total amount of Euro 35 billion were initially budgeted for the construction of a modern public transport network over 200km long. The endeavor consists of the extension of line 14 and the construction of the new lines 15, 16, 17, 18, including more than 60 new stations. In this context, TREVI was involved as specialty geotechnical contactor in various contracts, such as Le Bourget Airport, Aulnay and Saint-Denis Pleyel underground stations, as well as in a number of TBM launch shafts and intermediate service facilities.
The Bane Nor development project named “New double track Drammen-Kobbervikdalen” is part of the InterCity initiative and one of Norway’s largest railway projects. The project provides higher speed and more availability of trains on the Vestfoldbanen line, as well as more efficient train traffic through Drammen. The UDK02 project consisted in the progressive underground construction of the new Drammen-Kobbervikdalen high-speed line. The construction plan was prepared by Veidekke in cooperation with international experts, including TREVI, who contributed with its decades-long experience in ground engineering and innovative geotechnical solutions.
Skyway Stage 3 was the largest and most prominent project carried out in the Philippines in recent years. both from a technical and logistical points of view. The challenges were associated with the large diameter of the bored piles (up to 3500 mm) with an average depth of 40 m, and the traffic congestion of the highway that crosses the whole city of Metro Manila. The new 18.83 km long route, by connecting the North to the South of Metro Manila and allowing approx. 55,000 cars per day, will greatly reduce traffic on the main roads of the city of Manila. TREVI Philippines, the local subsidiary of TREVI, executed the foundation work for this project that entailed over 45,000 m of drilling, over 44,300 ton of steel reinforcement installed, and over 255,000 m3 of concrete cast, numbers that make the Skyway project the largest ever accomplished by the branch.
Trevi has patented an innovative system that allows installing pseudo elliptical jet grouted elements as opposed to the traditional cylindrical ones. This peculiar geometry is obtained by modulating the rotation speed according to a pre-set pattern. This system is particularly effective when the ground improvement is aimed at constructing alignments, such as a cut-off wall or improved grids, ensuring significant time and material savings. This system can also be effectively used to install cells to prevent liquefaction and, in certain conditions, even bottom plugs.
FIELD OF ACTIVITIES - Bridges
FIELD OF ACTIVITIES - Dams
FIELD OF ACTIVITIES - Environmental
FIELD OF ACTIVITIES - Metro
FIELD OF ACTIVITIES - Ports
- Contact Information
- Business Proposals
Company:
TREVI SPA
Telephone:
+39 0547.319311
Web site:
Address:
VIA DISMANO 5819
City:
CESENA (FC)
Zip Code:
47023
Social media:
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Rehabilitation of Mosul Dam (IRAQ)
In consideration of the critical situation characterizing the dam, in October 2015 the Iraqi Government, supported by the USACE (U.S. Army Corps of Engineers) issued an international invitation to tender with an emergency procedure, for the rehabilitation of the dam.
Trevi was awarded the contract at the beginning of March 2016, facing a very complex task at the Mosul Dam in Iraq.
The persistent political instability of the country - worsened by the conflict with the ISIS militias - had effectively prevented the dam adequate maintenance and consequently exacerbated the structural risk, making necessary massive and urgent restoration works.
The particular environmental / political conditions of that period, the urgent need for technical rehabilitation measures and the technical difficulties of the intervention, made this project highly challenging and risky for Trevi personnel, so much that the Italian Ministry of Defense decided to send a contingent of military forces to ensure the safety of more than 450 technicians and the dam presidium.
The Mosul Dam Project entailed also a specific Integration Program that ensured the transferal to Iraqi technicians of all the know-how needed in the future to manage the operations independently.
Web site
https://youtu.be/vyQ037pMB04
Documents
Chacao Bridge Project (CHILE)
The construction of the Chacao Bridge aims at connecting the continent with Chiloé Island over the Chacao Channel. The project is located 1.100km south of Santiago de Chile, in the Los Lagos Region, 48km away from Puerto Montt and only 5km away from Pargua.
Chacao Bridge was designed to have a length of 2,574 m and to be supported by three main pylons, one in the middle and two on each side of the channel, namely the North Pylon on the continent side and the South Pylon on the Chiloé Island’s. The span between the Central and North Pylons stretches for 1,155 m, while the one between the Central and South Pylons will cover a 1,055 m length, thus becoming the longest suspension bridge in South America once completed.
In December 2013, the contract for the construction of the bridge was awarded to the Consorcio Puente Chacao (Chacao Bridge Joint Venture), an entity formed by four international companies headed by the Korean Hyundai, while TREVI was appointed as the geotechnical subcontractor, responsible for the installation of deep foundations to support the three pylons. Offshore and onshore large diameter drilled shafts were installed in extremely challenging conditions between 2014 and 2020.
Recently, the design of the Chacao Bridge was recognized with the “Be Inspired” award in the category “Bridges Innovations”.
Web site
https://youtu.be/EH85gr79Vw0
Documents
Restoration of the Leaning Tower of Pisa (ITALY)
The Leaning Tower of Pisa, included in the "Piazza del Duomo" UNESCO World Heritage Site since 1987, has historically undergone monitoring and studies because of its two-fold risk: geotechnical risk of overturning and structural risk of failure due to brittle fracture. In the late 90’s the instability exacerbated so much that experts hurried to adopt a two-stage strategy which entailed an urgent, but reversible, stabilization activities and a subsequent, carefully devised and tested, implementation of permanent stabilization works.
To address the structural risk, temporary work consisted of circling some parts of the Tower with slightly pre-tensioned strands, while permanent work consisted of: a) inserting stainless steel bars to connect the inner and outer surfaces, b) performing injections in the masonry works, and c) wrapping the top of the first order and the bottom of the second order with harmonic stainless steel wires.
To address the geotechnical risk, temporary work entailed the application of counterweights, made of lead ingots for a total load of approx. 1,000 tons, on the northern side base of the Tower.
The permanent work was designed to reduce the inclination of the structure by about one-half degree and contextually preserve the integrity of the Tower. Among all the possible solutions, the taskforce of experts chose to induce a controlled settlement process in the foundations soils underneath the northern sector of the Tower by means of a so-called under-excavation.
TREVI was appointed as the specialty contractor to perform this task and did so by drilling several inclined boreholes, performed with fully augered drilling rods, that reached the target layers and allowed the extraction of controlled amount of soil from underneath the Monument.
Throughout the work, a complex monitoring system continuously controlled all the necessary parameters to ensure the Monument protection.
At the end of the under-excavation program, the Tower had rotated about 1,800 arc seconds (half a degree) northward; consequently, the 7th cornice had moved northward of about 43 cm while the northernmost point of the Catino had been lowered by about 17 cm. The "straightening" process, in addition to returning the Tower to the inclination it had about 200 years before, substantially reduced the pressure on the foundation soils on the south side significantly increasing the safety level of the Monument.
On June 16, 2001, the day of Saint Rainier (Pisa's Patron Saint), citizens were returned their Monument. On December 31 of the same year the International Committee that had been established more than 10 years before with the task of studying and implementing measures to restore the tower to health, was disbanded.
LPV 111 East Back Levee Improvement (USA)
The LPV111 East Back Levee Improvement Project is located along the Gulf Intracoastal Waterway in Orleans Parish of New Orleans and it is an essential component of the New Orleans Hurricane Protection System.
The existing levee sections suffered extensive damages from Hurricane Katrina, such that the US Army Corps of Engineers elected to provide earth stabilization and rebuild the levee sections as part of the Greater New Orleans Hurricane Storm Damage Risk Reduction System. Due to the adverse geotechnical properties of the foundation soils, wet Deep Mixing Method (DMM) was selected to stabilize the existing ground conditions ahead of the new levee installation.
The Project was awarded by the USACE as Early Contractor Involvement (ECI) to expedite the contractor selection and project construction schedule. As part of the ECI contract, TREVIICOS, the north-american subsidiary of TREVI, was actively involved in the finalization of the design and constructability. Over 5 miles of levee were stabilized employing a total of 8 drill rigs, single and double auger, carrying 5.25 ft diameter mixing tools. DMM elements were distributed in buttresses perpendicular to the levee axis and spaced 15.5 ft on-center. The elements were installed from a working platform, built with material resulting from the mixing operations, through mostly clayey and organic (peat) soils, and were keyed into the more competent Pleistocene layer. The DMM was installed to a maximum depth of 70 ft.
The soils were mixed in situ with predetermined quantities of binder, a blend of Slag and Portland cement. The grout was injected at the bottom of the drilling rods at different rates of pressure and flows to address the peculiar properties of each soil layer. Appropriate installation parameters were preliminarily identified through several laboratory and field tests and were constantly monitored in real-time during production through SOILMEC’s Drilling Mate System. The DMS allowed also the computer-controlled installation of the DMM elements and the immediate QC of the constructed element through a data email sent upon completion.
Three percent of the elements were cored for verification of the acceptance criteria; over 500 top to bottom continuous coring were drilled and over 5,000 specimens were tested for Unconfined Compressive Strength assessment.
Production was successfully completed ahead of schedule and with no remedial work. LPV 111 is the largest DMM project ever accomplished in North America, and possibly the world.
Galataport (TURKEY)
Galataport Project, located in the ancient district of Galata, now Beyoǧlu, in the heart of the historical city center, is probably the most prestigious endeavor ever achieved in Istanbul, Turkey. As one of the largest waterfront systems on earth, Galataport Istanbul covered a length of 1.2 kilometers of coastline on the Bosporus and a total area of 100,000 m2.
The Project was divided in two packages: Salıpazarı and Karaköy, which were firstly issued as two different tenders and were eventually both awarded to Trevi.
The concept tender design was deeply studied by the engineers of Trevi Design, Research & Development office. Several technical improvements and alternative solutions were proposed, resulting in a more sustainable design strategy and cost saving to the client. As a consequence of these efforts, Trevi acted both as main contractor and proposal designer for all geotechnical engineering works.
The difficult hydraulic and geotechnical condition, the seismic hazard of the site, the presence of historical buildings that needed to be protected and/or strengthened, the simultaneous reconstruction of the quay by other contractors, and the continuative operation of the port while construction activities were carried out, required the employment of cutting-edge technologies within the foundation engineering field.
The Salıpazarı package included the construction of an underground cruise port terminal; according to the design, the whole 65,000 m2 site area needed to be excavated down to approximately 15 m below ground level (13 m below sea level). The related foundation works entailed the execution of: a) an anchored diaphragm wall, by means of both mechanical grab and hydromill methods, b) a massive soil improvement program against liquefaction, by means of vibro-replacement and deep soil mixing technologies, c) a pile foundation array, by means of traditional bored piles technique, and d) the implementation of a dewatering system for the whole site.
The Karaköy package, in addition to the re-construction of its portion of quay, consisted of the refurbishment of five existing buildings. The non-historical buildings were demolished and rebuilt. The foundation works within their footprint consisted of: diaphragm wall, secant pile wall, jet grouting bottom plug, and permanent tension micropiles. In correspondence of the hystorical buildings, the related foundation works was conducted from inside the buildings, with reduced headroom, and consisted of a massive soil improvement against liquefaction by single fluid jet grouting and structural underpinning by means of micropiles to allow the excavation of a partial basement underneath the existing foundations.
For both packages, Trevi also installed and managed a vast monitoring system to keep the movement and forces acting on the different components of the foundation system under control.
Documents